Campagnolo Chorus EPS Rear Derailleur - 11 Speed Short Cage BlackCampagnolo Chorus EPS Rear Derailleur 11 Speed Short Cage Black. Features high torque high drive ratio motors for precise shifting under strain. Upper and lower body made of carbon powder technopolymer. Aluminum front plate and cage. IP67 rated waterproof. Compatible with Chorus EPS only. Multi Shifting System allows the rider to shift up or down by 11 sprockets in a single action Position Sensor moves the chain automatically into the ideal position